223400 has 24 divisors (see below), whose sum is σ = 519870. Its totient is φ = 89280.

The previous prime is 223381. The next prime is 223403. The reversal of 223400 is 4322.

It can be written as a sum of positive squares in 3 ways, for example, as 103684 + 119716 = 322^2 + 346^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (223403) by changing a digit.

223400 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 359 + ... + 758.

2²²³⁴⁰⁰ is an apocalyptic number.

223400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223400 is an abundant number, since it is smaller than the sum of its proper divisors (296470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223400 is a wasteful number, since it uses less digits than its factorization.

223400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 223400 is about 472.6520919239. The cubic root of 223400 is about 60.6775061473.

Adding to 223400 its reverse (4322), we get a palindrome (227722).

The spelling of 223400 in words is "two hundred twenty-three thousand, four hundred", and thus it is an iban number.